Perhaps he talks about campaign bot I used BigRig for example and got him very quick with that active ability) I just knocked him down the hill on the plane crush map)
The good thing about shooter is when you take the 2x damage boost and being low on health at once you get an extremely high damage for 10 seconds = 4x of your basic damage, i like when it happens, tho have to be careful with it
In my opinion any T4 weapon suits good since Shooter doesn't have any bonus damage for them. It depends on ur style, you can equip T4 rocket launcher and play more distantly or use the flame launcher for close combat tho they both cost much, but you said money's no trouble for you;)